Oil and jacket coolant heat exchanger



March 19, 11946. F. YOUNG ET AL 2,397,069

OIL AND JACKET COOLANT HEAT EXCHANGER Filed Aug. 7, 1941 4 Sheets-Sheet1 g INVENTORS.

w F250 MYou/ve W/LL/Am/Asmup March 19, 1946. F. M. YOUNG ET AL f fi fiOIL AND JACKET COOLANT HEAT EXCHANGER Filed Aug. 7, 1941 4 Sheets-Sheet3 INVENTORS FRED /7. You/Ye WILL/AM VASTRUP 5r 3' I ATTORNEY F. M. YOUNGETAL OIL AND JACKET GOOLANT HEAT EXCHANGER 4 Sheets-Sheet 4 Filed Aug.'7, 1941 INVENTORS. A250 M. YOU/Y6 W/LL/AM l/Asr u Patented Mar. 19,1946 OIL AND JACKET COOLANT HEAT EXCHANGER Fred M. Young and William V.Astrup, Racine, Wis., assignors to Young Radiator Company, Racine, Wis.,a company of Wisconsin Application August 7, 1941, Serial No. 405,783

3 Claims. (Cl. 257-236) The present invention relates to means forcooling the jacket coolant of an internal combustion engine and forcooling the lubricatin oil of the engine.

An object of the present invention is to provide a unitary heatexchanger having therein a single direct path for the cooling liquid inthe form of two bundles of tubes in separate chambers through which thebundles of tubes extend, forming separate paths for the coolant andInbricating oil.

An object of the present invention is to provide separate chambers forthe oil and jacket fluid which are suitably secured' together so thejacket cooling part of the device can be manufactured and soldseparately from the oil cooling part of the device or wherein the twomay be secured together forming a single unit.

The principal object of the present invention is to provide compact andefficient means for cooling the jacket fluid and lubricating oil of aninternal combustion engine, made possible because of the low temperatureof cooling water and the high heat exchange capacity of the water whenin contact with the tubes.

A further object of the present invention is to provide means wherebythe device may be easily connected to the cooling and lubricating oillines and to the cooling water supply.

An object of the present invention is to use a. coolant for the devicewhich is much more eflicient than air and more uniform in temperature,thus to greatly reduce the size and increase the efiiciency of thedevice.

Generally stated, an important object of the invention is to makepossible the successful use of any cooling water available, either saltwater, water with considerable soil in suspension or water havingconsiderable lime and the like.

Another object of the present invention is to provide a self-containedjacket coolant unit and an oil cooling unit, each of which may beseparately manufactured and secured together forming a single assembly.

Another object 'of the present invention is to provide means wherebyunequal expansion and contraction will not be harmful.

To these and other useful ends, our invention consists of parts,combinations of parts, or their equivalents, and mode of operation, ashereinafter set forth and claimed and shown in the accompanying drawingsin which:

Fig. 1 is a side levational view of our device adapted for cooling thecoolant of an internal combustion engine.

Fig. 2 is an end view of the device shown in Figure 1.

Fig. 3 is a side view of the core which is fractionally shown by dottedlines in Figures 1 and 2.

Fig. 4 is a partially sectioned end view of the core shown in Figure 3and sectioned on line 4-4 of this figure.

Fig. 5 is a top view of the device shown in Figure 1 having attachedthereto the oil cooling unit.

Fig. 6 is a side View of the device shown in Figure 5 with the majorpart of the housing of member A removed.

Fig. '7 is a side view of the coolant and oil cooling units securedtogether and illustrating a modification and showing the tubes andbaffle plates by dotted "lines.

Fig. 8 is a fractional longitudinal section of a modification.

In Figures 1 through 6 we illustrate either by dotted or solid lines thepreferred means to provide for unequal expansion and contraction betweenthe tubes and the main housing. In Figures '7 and 8, the coolant tubesare, at the left ends, secured to a header plate and expansion andcontraction is provided for in a special connection on the right end ofthe core, all of which will hereinafter be described.

Referring specifically to Figures 1 through 6. The housing of thecoolant cooling device is designated in its entirety by referencecharacter A. The inlet header cap for the housing is designated in itsentirety by reference character B. The right hand header cap for memberA is designated in its entirety by reference character C. The core inmember A is designated in its entirety by reference character D.

Housing or shell A is shaped as illustrated in Figures 1 and 2 having anupwardly extending liquid level chamber [0 with a filler cap H, thefiller cap being secured in the usual manner to a projection I2 onmember l0. As is the custom in automotive radiators, member If! may beconsidered the inlet header of the unit and the water level in this unitis expected to be kept somewhat below the overflow outlet which isprovided with drain tube l3.

Core D (see Figure 3) comprises a large number of closely spaced tubesI4, the ends being extended through a tube plate [5. We provide a headerfor the other ends of tubes it having a tube plate IS with an outwardlyextending flange H, the tube extending through plate l6 and beingsuitably bonded thereto.

A header cap 18 is provided (see Figure 3) having a flange I 9 adaptedtoflt into flange l1 and being bonded or welded thereto as at 28. Thus acomplete header is provided, forming an inlet to tubes l4, member l8having secured on its inner side a bracket 2|, the bracket having anopening 22 which registers with an opening 23 in member l8.

Member I8 is suitably bonded to member 2| which is suitably shaped forscrew threaded openings '24 (see Figure 3). Members A and B are providedwith adjacent surfaces suitable for a gasket 25. Member B is suitablyheld to member A by a number of bolts 26 and being provided with anopening 21 which registers with the opening 23 in member "I8.

Member B is provided with apertures which register with screw threadedopenings 24 in member 2|. openings 24 and slidably extend through theopenings in member B and are adapted to act as fasteners for an inletconnection. n the inner side of member B we provide a raised surface 28adapted to flt on the outer surface of member l8 directly over member 2|and we provide a suitable gasket between members l8 and 28 whereby studs24' may act to hold members l8 and 28 against the gasket forming a leakproof joint. It will be seen that the cooling medium may enter inlet 21and pass into the header from whence it may flow through tubes l4.

It will be noted that bracket 2| is spaced a distance from flange I9 somember 8 will permit a limited endwise movement of the header relativeto member B and provide for manufacturing and gasket variations.

A gasket 35 is provided between tube plate l and the end of member A andanother gasket 35 is positioned between members l6 and member C and theassembly held together by means of bolts 36. Header cap C is providedwith an outlet opening 31 which is preferably supplied with a suitablesurface for making a flanged connection to the outlet pipe and headercap B is supplied with a similar surface for a flanged connection forthe inlet pipe. Thus it will be seen that member 8 is flexibl enough toprovide for independent expansion and contraction of the bundle of tubesD, the bundle being shaped to loosely fill the space within member A.

Member A has side walls 38-38, a bottom wall 39' and preferably apartition 39.

A plate 40 is positioned on the top row of tubes and secured at its endsto members l5 and I6, one end being slidable so it may expand andcontract independent of the tubes. The edges of this plate and a similarbottom plate 46 are bent as illustrated forming flanges 4|-4|; flangedopenings 42 are provided near the ends of these plates as illustrated.

We provide a synthetic rubber washer 44 which fits over the flange ofopening 42 and is thick enough so when core D is raised high enough sothe bolt openings in members l5 and B register, the washer is compressedso as to form a liquid tight joint between members 39 and 46. Thus aconnection is formed between the chamber in member I6 and the top of thecore.

The side walls of member A near their tops and bottoms are provided withinward projections 45 (se dotted lines in Figure 2). These projectionsface each other and are spaced apart so flanges 4| at their edges areyieldingly held in contact therewith. The sides of core D are Studs 24are screw threaded into plates 46 and being provided with alternately.

positioned passageways 48. Clearly the engine coolant will pass fromopening 42 sinuously between the tubes as indicated by dotted arrows inFigure 1. We provide another plate which is secured to the bottom row oftubes but reversed end .for end so opening 42 completes the sinuous paththrough the bank of tubes and forms an outlet from the bank of tubesadjacent outlet 5| in the shell.

We provide an outlet in the bottom of member A as at 5| having means fora flanged connection to which the outlet pipe may be secured. An inletconnection 52 is provided in the left rear side of member III alsohaving means for a flanged connection (see dotted lines in Figure 1).Thus it will be seen that the coolant may enter at 52, pass throughchamber In as a header and then down through the core sinuously tooutlet 5| from whence the coolant is returned to the engine jackets.

It will be seen that the cooling water passing through the tubes willact to cool the engine coolant and the device as illustrated in Figures1 and 2 will act very similar to an automobile or truck radiator exceptthat instead of a blast of air being used for the cooling medium, wateris used for the purpose. However, because of the more uniformtemperature of the cooling water and its high heatconductivity capacity,the device will be much smaller than the ordinary air cooled radiator.

Clearly core D can be easily removed and replaced and access to thetubes and the interior of the housing is provided for inspection orcleaning.

Referring now to Figures 5 and 6, it'will be noted that an oil coolingunit which is designated by reference character E is secured to theright hand end of member A in place of header C. Member E comprises arectangular chamber having end flanges 6| and 62. Flange 6| is adaptedto lie on member I 5 with a gasket 35 intervening and member E isfastened and sealed to member A by bolts 36. Header C is then secured toflanges 62 by means of a gasket 35 and bolts 63.

We provide tube plates 64-64 which are secured to the inner surface ofthe walls of member E by welding or otherwise as at 65 (also shown inFigure '1). We provide a large number of tubes 66 which extend throughtube plates 64 as clearly illustrated by dotted lines in Figures 6 and7. It will be seen that the cooling water discharged ,from tubes l4enters the space formed by adjacent tube plates i5 and 64 from whence itwill flow through tubes 66 and into the space formed by header C and bedischarged through outlet 31. Clearly the bundle of tubes 66 will becooled by the cooling water after it passes through core D.

Member E is provided with an inlet connection as at 61 and an outletconnection as at 68. Alternately arranged and spaced baflle plates 69are provided whereby the lubricating oil from the engine served mayenter at 61 and pass between tubes 66 sinuously as illustrated byarrows. Thus it will be seen that the device illustrated in Fi ures 1through 4 may be equipped with means for cooling the lubricating oil aswell as the jacket coolant and that the cooling is al'; e by watercaused to pass in series through the tubcs of the banksof tubes.

In Figures 7 and 8 I illustrate a modification wherein other means areprovided for taking care of unequal expansion and contraction betweentubes 14 and housing A. The left hand header shown in Figures 1 through6 is dispensed with and tubes I4 are extended through a tube plate 15.

A header cap 16 is provided and the tube plate is fastened and sealed tohousing A by means of gaskets 25 and bolts 29. Header cap 16 is providedwith an inlet opening as at 11 similar to inlet 21 in Figure 1. Theother ends of tubes 16 extend through a tube plate 18.

Tube plate 18 is made somewhat smaller than the inside of housing A anda sealed fiexibleconnection is made between this tube plate and the endof housing A preferably by means of a synthetic rubber gasket 19, thegasket being bound and sealed to plate 18 by means of strips 80 andbolts 8| Clearly flexible member 19 will provide for independentexpansion and contraction of the tubes relative to housing A and thewater leaving tubes 14 will be caused to enter tubes 66 similar to thedesign shown in Figures and 6.

In Figure 7, we illustrate a header 82 having an outlet opening as at 83similar to outlet opening 31 in header C. Header 82 is providedpreferably with a vertically extended projection 84 having a screwthreaded opening 85 in its top adapted to receive a pipe plug 86, theplu being provided with a zinc element 81 which occupies the spaceprovided by projection 84. This element is adapted to counteractelectrolysis in the cooling part of the system, the element beingproperly secured to plug 86 so it can easily be removed and replaced.

Clearly we have provided a very compact jacket water and lubricating oilcooling device having a shape and being designed so it will answer thesame purpose as a cooling radiator and individual oil coolers by makinguse of water as a coolant instead of air so the device can be made verycured to its inner surface, said wall and bracket having registeringopenings which register with said other cap opening, means whereby said"bracket and cap may be removably fastened and sealed together at saidopening comprising a gasket and bolts, said bolts slidably extendingthrough said other cap and being screw threaded into said bracket, saidbracket being spaced a distance from the edge of the outer wall of saidheader whereby said bundle of tubes may expand and contract independentof the other cap.

2. A device of the character described comprising; a shell, a bundle oftubes in said shell having a tube plate at one end which overlies theadjacent end of the shell, a cap having an opening and a surface adaptedto register with the overlying portion of said tube plate, means toremovably fasten and sealthe cap, tube plate and shell together, anothercap having an opening and a surface adapted to be removably fastened andsealed to the other end of the shell, a header for the other end of thetubes having an opening which registers with the opening in the othercap and means for binding and sealing the header and other cap togetheraround their said openings, an inclosure for said tube bundle having aninlet at its top and an outlet at its bottom, sealing means between thesides of said inclosure and said shell, a liquid level extension on thetop of said shell having an inlet and an outlet to said enclosure inlet,said shell having an outlet at its bottom adjacent said enclosureoutlet, thereby to form a liquid passageway through said inclosure fromsaid extension inlet to the shell outlet and a liquid passageway throughsaid bundle of tubes from said other cap to the outlet of said firstmentioned cap opening.

3. A device of the character described comprising; a shell, a bundle oftubes in said shell having a tube plate at one end which overlies themuch smaller than the units they displace, thus to increase eiilciency,reduce the space occupied, particularly where larger space is notavailable and a device which can be disassembled and reassembled forcleaning and inspection.

Clearly many minor detailed changes may be made without departing fromthe spirit and scope of our invention as recited in the appended claims.

Having thus shown and described our invention, we claim:

1. A device of the class described, comprising a shell, a bundle oftubes in said shell having a tube plate at one end which overlies theadjacent end of the shell, a cap having an opening and a surface adaptedto register with the overlying portion of said tube plate, means toremovably fasten and seal the cap and tube plate to the shell, anothercap having an opening and a surface adapted to be removably fastened andsealed to the other end of the shell, a header for the other ends of thetubes, the outer end wall of which is flat and made of thin flexiblemetal and having a bracket seadjacent end of the shell, a cap having anopening and a surface adapted to register with the overlying portion ofsaid tube plate, means to removably fasten and seal the cap, tube plateand shell together, another cap having an opening and a surface adaptedto be removably fastened and sealed to the other end of the shell, aheader for the other end of the tubes having an opening which registerswith the opening in the other cap and means for binding and sealing theheader and other cap together around their said openings, an inclosurefor said tube bundle having an inlet at its top and an outlet at itsbottom, a liquid level extension on the top of said shell having aninlet, of said shell having an outlet at its bottom, a partition in thebottom of said extension having an outlet which registers with the inletin said inclosure with sealing means therebetween, thereby to form aliquid passageway through said enclosure from said extension inlet tothe shell outlet and a liquid passageway through said bundle of tubesfrom said first and other cap openings.

FRED M. YOUNG. WILLIAM V. ASTRUP.

